Influencer (agent of influence, opinion leader) – SEO WIKI
An influencer (an agent of influence, an opinion leader) is a person who influences the formation of an opinion about certain things in his audience. The fact that a person thinks how he relates to something is of great importance to his audience. Opinion leaders on social networks use this as a way to distribute advertising information under the guise of their own impression.
The most common phenomenon is opinion leaders on Instagram: famous artists, bloggers, photographers, and so on.